We prove Szegő–Widom asymptotics for the Chebyshev polynomials of a compact subset of which is regular for potential theory and obeys the Parreau–Widom and DCT conditions.
"Asymptotics of Chebyshev polynomials, II: DCT subsets of ." Duke Math. J. 168 (2) 325 - 349, 1 February 2019. https://doi.org/10.1215/00127094-2018-0045